class Net::BufferedIO

def read_all(dest = ''.b)
  LOG 'reading all...'
  read_bytes = 0
  begin
    while true
      if s = rbuf_consume_all
        read_bytes += s.bytesize
        dest << s
      end
      rbuf_fill
    end
  rescue EOFError
    ;
  end
  LOG "read #{read_bytes} bytes"
  dest
end